/* Javascript plotting library for jQuery, version 0.8.1.

Copyright (c) 2007-2013 IOLA and Ole Laursen.
Licensed under the MIT license.

 */

// first an inline dependency, jquery.colorhelpers.js, we inline it here
// for convenience
/* Plugin for jQuery for working with colors.
 *
 * Version 1.1.
 *
 * Inspiration from jQuery color animation plugin by John Resig.
 *
 * Released under the MIT license by Ole Laursen, October 2009.
 *
 * Examples:
 *
 *   $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString()
 *   var c = $.color.extract($("#mydiv"), 'background-color');
 *   console.log(c.r, c.g, c.b, c.a);
 *   $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
 *
 * Note that .scale() and .add() return the same modified object
 * instead of making a new one.
 *
 * V. 1.1: Fix error handling so e.g. parsing an empty string does
 * produce a color rather than just crashing.
 */
(function(B) {
	B.color = {};
	B.color.make = function(F, E, C, D) {
		var G = {};
		G.r = F || 0;
		G.g = E || 0;
		G.b = C || 0;
		G.a = D != null ? D : 1;
		G.add = function(J, I) {
			for (var H = 0; H < J.length; ++H) {
				G[J.charAt(H)] += I
			}
			return G.normalize()
		};
		G.scale = function(J, I) {
			for (var H = 0; H < J.length; ++H) {
				G[J.charAt(H)] *= I
			}
			return G.normalize()
		};
		G.toString = function() {
			if (G.a >= 1) {
				return "rgb(" + [ G.r, G.g, G.b ].join(",") + ")"
			} else {
				return "rgba(" + [ G.r, G.g, G.b, G.a ].join(",") + ")"
			}
		};
		G.normalize = function() {
			function H(J, K, I) {
				return K < J ? J : (K > I ? I : K)
			}
			G.r = H(0, parseInt(G.r), 255);
			G.g = H(0, parseInt(G.g), 255);
			G.b = H(0, parseInt(G.b), 255);
			G.a = H(0, G.a, 1);
			return G
		};
		G.clone = function() {
			return B.color.make(G.r, G.b, G.g, G.a)
		};
		return G.normalize()
	};
	B.color.extract = function(D, C) {
		var E;
		do {
			E = D.css(C).toLowerCase();
			if (E != "" && E != "transparent") {
				break
			}
			D = D.parent()
		} while (!B.nodeName(D.get(0), "body"));
		if (E == "rgba(0, 0, 0, 0)") {
			E = "transparent"
		}
		return B.color.parse(E)
	};
	B.color.parse = function(F) {
		var E, C = B.color.make;
		if (E = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/
				.exec(F)) {
			return C(parseInt(E[1], 10), parseInt(E[2], 10), parseInt(E[3], 10))
		}
		if (E = /rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/
				.exec(F)) {
			return C(parseInt(E[1], 10), parseInt(E[2], 10),
					parseInt(E[3], 10), parseFloat(E[4]))
		}
		if (E = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/
				.exec(F)) {
			return C(parseFloat(E[1]) * 2.55, parseFloat(E[2]) * 2.55,
					parseFloat(E[3]) * 2.55)
		}
		if (E = /rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/
				.exec(F)) {
			return C(parseFloat(E[1]) * 2.55, parseFloat(E[2]) * 2.55,
					parseFloat(E[3]) * 2.55, parseFloat(E[4]))
		}
		if (E = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(F)) {
			return C(parseInt(E[1], 16), parseInt(E[2], 16), parseInt(E[3], 16))
		}
		if (E = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(F)) {
			return C(parseInt(E[1] + E[1], 16), parseInt(E[2] + E[2], 16),
					parseInt(E[3] + E[3], 16))
		}
		var D = B.trim(F).toLowerCase();
		if (D == "transparent") {
			return C(255, 255, 255, 0)
		} else {
			E = A[D] || [ 0, 0, 0 ];
			return C(E[0], E[1], E[2])
		}
	};
	var A = {
		aqua : [ 0, 255, 255 ],
		azure : [ 240, 255, 255 ],
		beige : [ 245, 245, 220 ],
		black : [ 0, 0, 0 ],
		blue : [ 0, 0, 255 ],
		brown : [ 165, 42, 42 ],
		cyan : [ 0, 255, 255 ],
		darkblue : [ 0, 0, 139 ],
		darkcyan : [ 0, 139, 139 ],
		darkgrey : [ 169, 169, 169 ],
		darkgreen : [ 0, 100, 0 ],
		darkkhaki : [ 189, 183, 107 ],
		darkmagenta : [ 139, 0, 139 ],
		darkolivegreen : [ 85, 107, 47 ],
		darkorange : [ 255, 140, 0 ],
		darkorchid : [ 153, 50, 204 ],
		darkred : [ 139, 0, 0 ],
		darksalmon : [ 233, 150, 122 ],
		darkviolet : [ 148, 0, 211 ],
		fuchsia : [ 255, 0, 255 ],
		gold : [ 255, 215, 0 ],
		green : [ 0, 128, 0 ],
		indigo : [ 75, 0, 130 ],
		khaki : [ 240, 230, 140 ],
		lightblue : [ 173, 216, 230 ],
		lightcyan : [ 224, 255, 255 ],
		lightgreen : [ 144, 238, 144 ],
		lightgrey : [ 211, 211, 211 ],
		lightpink : [ 255, 182, 193 ],
		lightyellow : [ 255, 255, 224 ],
		lime : [ 0, 255, 0 ],
		magenta : [ 255, 0, 255 ],
		maroon : [ 128, 0, 0 ],
		navy : [ 0, 0, 128 ],
		olive : [ 128, 128, 0 ],
		orange : [ 255, 165, 0 ],
		pink : [ 255, 192, 203 ],
		purple : [ 128, 0, 128 ],
		violet : [ 128, 0, 128 ],
		red : [ 255, 0, 0 ],
		silver : [ 192, 192, 192 ],
		white : [ 255, 255, 255 ],
		yellow : [ 255, 255, 0 ]
	}
})(jQuery);

// the actual Flot code
(function($) {

	// Cache the prototype hasOwnProperty for faster access

	var hasOwnProperty = Object.prototype.hasOwnProperty;

	// /////////////////////////////////////////////////////////////////////////
	// The Canvas object is a wrapper around an HTML5 <canvas> tag.
	//
	// @constructor
	// @param {string} cls List of classes to apply to the canvas.
	// @param {element} container Element onto which to append the canvas.
	//
	// Requiring a container is a little iffy, but unfortunately canvas
	// operations don't work unless the canvas is attached to the DOM.

	function Canvas(cls, container) {

		var element = container.children("." + cls)[0];

		if (element == null) {

			element = document.createElement("canvas");
			element.className = cls;

			$(element).css({
				direction : "ltr",
				position : "absolute",
				left : 0,
				top : 0
			}).appendTo(container);

			// If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas

			if (!element.getContext) {
				if (window.G_vmlCanvasManager) {
					element = window.G_vmlCanvasManager.initElement(element);
				} else {
					throw new Error(
							"Canvas is not available. If you're using IE with a fall-back such as Excanvas, then there's either a mistake in your conditional include, or the page has no DOCTYPE and is rendering in Quirks Mode.");
				}
			}
		}

		this.element = element;

		var context = this.context = element.getContext("2d");

		// Determine the screen's ratio of physical to device-independent
		// pixels. This is the ratio between the canvas width that the browser
		// advertises and the number of pixels actually present in that space.

		// The iPhone 4, for example, has a device-independent width of 320px,
		// but its screen is actually 640px wide. It therefore has a pixel
		// ratio of 2, while most normal devices have a ratio of 1.

		var devicePixelRatio = window.devicePixelRatio || 1, backingStoreRatio = context.webkitBackingStorePixelRatio
				|| context.mozBackingStorePixelRatio
				|| context.msBackingStorePixelRatio
				|| context.oBackingStorePixelRatio
				|| context.backingStorePixelRatio || 1;

		this.pixelRatio = devicePixelRatio / backingStoreRatio;

		// Size the canvas to match the internal dimensions of its container

		this.resize(container.width(), container.height());

		// Collection of HTML div layers for text overlaid onto the canvas

		this.textContainer = null;
		this.text = {};

		// Cache of text fragments and metrics, so we can avoid expensively
		// re-calculating them when the plot is re-rendered in a loop.

		this._textCache = {};
	}

	// Resizes the canvas to the given dimensions.
	//
	// @param {number} width New width of the canvas, in pixels.
	// @param {number} width New height of the canvas, in pixels.

	Canvas.prototype.resize = function(width, height) {

		if (width <= 0 || height <= 0) {
			throw new Error("Invalid dimensions for plot, width = " + width
					+ ", height = " + height);
		}

		var element = this.element, context = this.context, pixelRatio = this.pixelRatio;

		// Resize the canvas, increasing its density based on the display's
		// pixel ratio; basically giving it more pixels without increasing the
		// size of its element, to take advantage of the fact that retina
		// displays have that many more pixels in the same advertised space.

		// Resizing should reset the state (excanvas seems to be buggy though)

		if (this.width != width) {
			element.width = width * pixelRatio;
			element.style.width = width + "px";
			this.width = width;
		}

		if (this.height != height) {
			element.height = height * pixelRatio;
			element.style.height = height + "px";
			this.height = height;
		}

		// Save the context, so we can reset in case we get replotted. The
		// restore ensure that we're really back at the initial state, and
		// should be safe even if we haven't saved the initial state yet.

		context.restore();
		context.save();

		// Scale the coordinate space to match the display density; so even
		// though we
		// may have twice as many pixels, we still want lines and other drawing
		// to
		// appear at the same size; the extra pixels will just make them
		// crisper.

		context.scale(pixelRatio, pixelRatio);
	};

	// Clears the entire canvas area, not including any overlaid HTML text

	Canvas.prototype.clear = function() {
		this.context.clearRect(0, 0, this.width, this.height);
	};

	// Finishes rendering the canvas, including managing the text overlay.

	Canvas.prototype.render = function() {

		var cache = this._textCache;

		// For each text layer, add elements marked as active that haven't
		// already been rendered, and remove those that are no longer active.

		for ( var layerKey in cache) {
			if (hasOwnProperty.call(cache, layerKey)) {

				var layer = this.getTextLayer(layerKey), layerCache = cache[layerKey];

				layer.hide();

				for ( var styleKey in layerCache) {
					if (hasOwnProperty.call(layerCache, styleKey)) {
						var styleCache = layerCache[styleKey];
						for ( var key in styleCache) {
							if (hasOwnProperty.call(styleCache, key)) {

								var positions = styleCache[key].positions;

								for (var i = 0, position; position = positions[i]; i++) {
									if (position.active) {
										if (!position.rendered) {
											layer.append(position.element);
											position.rendered = true;
										}
									} else {
										positions.splice(i--, 1);
										if (position.rendered) {
											position.element.detach();
										}
									}
								}

								if (positions.length == 0) {
									delete styleCache[key];
								}
							}
						}
					}
				}

				layer.show();
			}
		}
	};

	// Creates (if necessary) and returns the text overlay container.
	//
	// @param {string} classes String of space-separated CSS classes used to
	// uniquely identify the text layer.
	// @return {object} The jQuery-wrapped text-layer div.

	Canvas.prototype.getTextLayer = function(classes) {

		var layer = this.text[classes];

		// Create the text layer if it doesn't exist

		if (layer == null) {

			// Create the text layer container, if it doesn't exist

			if (this.textContainer == null) {
				this.textContainer = $("<div class='flot-text'></div>").css({
					position : "absolute",
					top : 0,
					left : 0,
					bottom : 0,
					right : 0,
					'font-size' : "smaller",
					color : "#545454"
				}).insertAfter(this.element);
			}

			layer = this.text[classes] = $("<div></div>").addClass(classes)
					.css({
						position : "absolute",
						top : 0,
						left : 0,
						bottom : 0,
						right : 0
					}).appendTo(this.textContainer);
		}

		return layer;
	};

	// Creates (if necessary) and returns a text info object.
	//
	// The object looks like this:
	//
	// {
	// width: Width of the text's wrapper div.
	// height: Height of the text's wrapper div.
	// element: The jQuery-wrapped HTML div containing the text.
	// positions: Array of positions at which this text is drawn.
	// }
	//
	// The positions array contains objects that look like this:
	//
	// {
	// active: Flag indicating whether the text should be visible.
	// rendered: Flag indicating whether the text is currently visible.
	// element: The jQuery-wrapped HTML div containing the text.
	// x: X coordinate at which to draw the text.
	// y: Y coordinate at which to draw the text.
	// }
	//
	// Each position after the first receives a clone of the original element.
	//
	// The idea is that that the width, height, and general 'identity' of the
	// text is constant no matter where it is placed; the placements are a
	// secondary property.
	//
	// Canvas maintains a cache of recently-used text info objects; getTextInfo
	// either returns the cached element or creates a new entry.
	//
	// @param {string} layer A string of space-separated CSS classes uniquely
	// identifying the layer containing this text.
	// @param {string} text Text string to retrieve info for.
	// @param {(string|object)=} font Either a string of space-separated CSS
	// classes or a font-spec object, defining the text's font and style.
	// @param {number=} angle Angle at which to rotate the text, in degrees.
	// Angle is currently unused, it will be implemented in the future.
	// @param {number=} width Maximum width of the text before it wraps.
	// @return {object} a text info object.

	Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) {

		var textStyle, layerCache, styleCache, info;

		// Cast the value to a string, in case we were given a number or such

		text = "" + text;

		// If the font is a font-spec object, generate a CSS font definition

		if (typeof font === "object") {
			textStyle = font.style + " " + font.variant + " " + font.weight
					+ " " + font.size + "px/" + font.lineHeight + "px "
					+ font.family;
		} else {
			textStyle = font;
		}

		// Retrieve (or create) the cache for the text's layer and styles

		layerCache = this._textCache[layer];

		if (layerCache == null) {
			layerCache = this._textCache[layer] = {};
		}

		styleCache = layerCache[textStyle];

		if (styleCache == null) {
			styleCache = layerCache[textStyle] = {};
		}

		info = styleCache[text];

		// If we can't find a matching element in our cache, create a new one

		if (info == null) {

			var element = $("<div></div>").html(text).css({
				position : "absolute",
				'max-width' : width,
				top : -9999
			}).appendTo(this.getTextLayer(layer));

			if (typeof font === "object") {
				element.css({
					font : textStyle,
					color : font.color
				});
			} else if (typeof font === "string") {
				element.addClass(font);
			}

			info = styleCache[text] = {
				width : element.outerWidth(true),
				height : element.outerHeight(true),
				element : element,
				positions : []
			};

			element.detach();
		}

		return info;
	};

	// Adds a text string to the canvas text overlay.
	//
	// The text isn't drawn immediately; it is marked as rendering, which will
	// result in its addition to the canvas on the next render pass.
	//
	// @param {string} layer A string of space-separated CSS classes uniquely
	// identifying the layer containing this text.
	// @param {number} x X coordinate at which to draw the text.
	// @param {number} y Y coordinate at which to draw the text.
	// @param {string} text Text string to draw.
	// @param {(string|object)=} font Either a string of space-separated CSS
	// classes or a font-spec object, defining the text's font and style.
	// @param {number=} angle Angle at which to rotate the text, in degrees.
	// Angle is currently unused, it will be implemented in the future.
	// @param {number=} width Maximum width of the text before it wraps.
	// @param {string=} halign Horizontal alignment of the text; either "left",
	// "center" or "right".
	// @param {string=} valign Vertical alignment of the text; either "top",
	// "middle" or "bottom".

	Canvas.prototype.addText = function(layer, x, y, text, font, angle, width,
			halign, valign) {

		var info = this.getTextInfo(layer, text, font, angle, width), positions = info.positions;

		// Tweak the div's position to match the text's alignment

		if (halign == "center") {
			x -= info.width / 2;
		} else if (halign == "right") {
			x -= info.width;
		}

		if (valign == "middle") {
			y -= info.height / 2;
		} else if (valign == "bottom") {
			y -= info.height;
		}

		// Determine whether this text already exists at this position.
		// If so, mark it for inclusion in the next render pass.

		for (var i = 0, position; position = positions[i]; i++) {
			if (position.x == x && position.y == y) {
				position.active = true;
				return;
			}
		}

		// If the text doesn't exist at this position, create a new entry

		// For the very first position we'll re-use the original element,
		// while for subsequent ones we'll clone it.

		position = {
			active : true,
			rendered : false,
			element : positions.length ? info.element.clone() : info.element,
			x : x,
			y : y
		}

		positions.push(position);

		// Move the element to its final position within the container

		position.element.css({
			top : Math.round(y),
			left : Math.round(x),
			'text-align' : halign
		// In case the text wraps
		});
	};

	// Removes one or more text strings from the canvas text overlay.
	//
	// If no parameters are given, all text within the layer is removed.
	//
	// Note that the text is not immediately removed; it is simply marked as
	// inactive, which will result in its removal on the next render pass.
	// This avoids the performance penalty for 'clear and redraw' behavior,
	// where we potentially get rid of all text on a layer, but will likely
	// add back most or all of it later, as when redrawing axes, for example.
	//
	// @param {string} layer A string of space-separated CSS classes uniquely
	// identifying the layer containing this text.
	// @param {number=} x X coordinate of the text.
	// @param {number=} y Y coordinate of the text.
	// @param {string=} text Text string to remove.
	// @param {(string|object)=} font Either a string of space-separated CSS
	// classes or a font-spec object, defining the text's font and style.
	// @param {number=} angle Angle at which the text is rotated, in degrees.
	// Angle is currently unused, it will be implemented in the future.

	Canvas.prototype.removeText = function(layer, x, y, text, font, angle) {
		if (text == null) {
			var layerCache = this._textCache[layer];
			if (layerCache != null) {
				for ( var styleKey in layerCache) {
					if (hasOwnProperty.call(layerCache, styleKey)) {
						var styleCache = layerCache[styleKey];
						for ( var key in styleCache) {
							if (hasOwnProperty.call(styleCache, key)) {
								var positions = styleCache[key].positions;
								for (var i = 0, position; position = positions[i]; i++) {
									position.active = false;
								}
							}
						}
					}
				}
			}
		} else {
			var positions = this.getTextInfo(layer, text, font, angle).positions;
			for (var i = 0, position; position = positions[i]; i++) {
				if (position.x == x && position.y == y) {
					position.active = false;
				}
			}
		}
	};

	// /////////////////////////////////////////////////////////////////////////
	// The top-level container for the entire plot.

	function Plot(placeholder, data_, options_, plugins) {
		// data is on the form:
		// [ series1, series2 ... ]
		// where series is either just the data as [ [x1, y1], [x2, y2], ... ]
		// or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... }

		var series = [], options = {
			// the color theme used for graphs
			colors : [ "#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed" ],
			legend : {
				show : true,
				noColumns : 1, // number of colums in legend table
				labelFormatter : null, // fn: string -> string
				labelBoxBorderColor : "#ccc", // border color for the little
												// label boxes
				container : null, // container (as jQuery object) to put
									// legend in, null means default on top of
									// graph
				position : "ne", // position of default legend container
									// within plot
				margin : 5, // distance from grid edge to default legend
							// container within plot
				backgroundColor : null, // null means auto-detect
				backgroundOpacity : 0.85, // set to 0 to avoid background
				sorted : null
			// default to no legend sorting
			},
			xaxis : {
				show : null, // null = auto-detect, true = always, false =
								// never
				position : "bottom", // or "top"
				mode : null, // null or "time"
				font : null, // null (derived from CSS in placeholder) or
								// object like { size: 11, lineHeight: 13,
								// style: "italic", weight: "bold", family:
								// "sans-serif", variant: "small-caps" }
				color : null, // base color, labels, ticks
				tickColor : null, // possibly different color of ticks, e.g.
									// "rgba(0,0,0,0.15)"
				transform : null, // null or f: number -> number to transform
									// axis
				inverseTransform : null, // if transform is set, this should
											// be the inverse function
				min : null, // min. value to show, null means set automatically
				max : null, // max. value to show, null means set automatically
				autoscaleMargin : null, // margin in % to add if auto-setting
										// min/max
				ticks : null, // either [1, 3] or [[1, "a"], 3] or (fn: axis
								// info -> ticks) or app. number of ticks for
								// auto-ticks
				tickFormatter : null, // fn: number -> string
				labelWidth : null, // size of tick labels in pixels
				labelHeight : null,
				reserveSpace : null, // whether to reserve space even if axis
										// isn't shown
				tickLength : null, // size in pixels of ticks, or "full" for
									// whole line
				alignTicksWithAxis : null, // axis number or null for no sync
				tickDecimals : null, // no. of decimals, null means auto
				tickSize : null, // number or [number, "unit"]
				minTickSize : null
			// number or [number, "unit"]
			},
			yaxis : {
				autoscaleMargin : 0.02,
				position : "left" // or "right"
			},
			xaxes : [],
			yaxes : [],
			series : {
				points : {
					show : false,
					radius : 3,
					lineWidth : 2, // in pixels
					fill : true,
					fillColor : "#ffffff",
					symbol : "circle" // or callback
				},
				lines : {
					// we don't put in show: false so we can see
					// whether lines were actively disabled
					lineWidth : 2, // in pixels
					fill : false,
					fillColor : null,
					steps : false
				// Omit 'zero', so we can later default its value to
				// match that of the 'fill' option.
				},
				bars : {
					show : false,
					lineWidth : 2, // in pixels
					barWidth : 1, // in units of the x axis
					fill : true,
					fillColor : null,
					align : "left", // "left", "right", or "center"
					horizontal : false,
					zero : true
				},
				shadowSize : 3,
				highlightColor : null
			},
			grid : {
				show : true,
				aboveData : false,
				color : "#545454", // primary color used for outline and labels
				backgroundColor : null, // null for transparent, else color
				borderColor : null, // set if different from the grid color
				tickColor : null, // color for the ticks, e.g.
									// "rgba(0,0,0,0.15)"
				margin : 0, // distance from the canvas edge to the grid
				labelMargin : 5, // in pixels
				axisMargin : 8, // in pixels
				borderWidth : 2, // in pixels
				minBorderMargin : null, // in pixels, null means taken from
										// points radius
				markings : null, // array of ranges or fn: axes -> array of
									// ranges
				markingsColor : "#f4f4f4",
				markingsLineWidth : 2,
				// interactive stuff
				clickable : false,
				hoverable : false,
				autoHighlight : true, // highlight in case mouse is near
				mouseActiveRadius : 10
			// how far the mouse can be away to activate an item
			},
			interaction : {
				redrawOverlayInterval : 1000 / 60
			// time between updates, -1 means in same flow
			},
			hooks : {}
		}, surface = null, // the canvas for the plot itself
		overlay = null, // canvas for interactive stuff on top of plot
		eventHolder = null, // jQuery object that events should be bound to
		ctx = null, octx = null, xaxes = [], yaxes = [], plotOffset = {
			left : 0,
			right : 0,
			top : 0,
			bottom : 0
		}, plotWidth = 0, plotHeight = 0, hooks = {
			processOptions : [],
			processRawData : [],
			processDatapoints : [],
			processOffset : [],
			drawBackground : [],
			drawSeries : [],
			draw : [],
			bindEvents : [],
			drawOverlay : [],
			shutdown : []
		}, plot = this;

		// public functions
		plot.setData = setData;
		plot.setupGrid = setupGrid;
		plot.draw = draw;
		plot.getPlaceholder = function() {
			return placeholder;
		};
		plot.getCanvas = function() {
			return surface.element;
		};
		plot.getPlotOffset = function() {
			return plotOffset;
		};
		plot.width = function() {
			return plotWidth;
		};
		plot.height = function() {
			return plotHeight;
		};
		plot.offset = function() {
			var o = eventHolder.offset();
			o.left += plotOffset.left;
			o.top += plotOffset.top;
			return o;
		};
		plot.getData = function() {
			return series;
		};
		plot.getAxes = function() {
			var res = {}, i;
			$.each(xaxes.concat(yaxes),
					function(_, axis) {
						if (axis)
							res[axis.direction + (axis.n != 1 ? axis.n : "")
									+ "axis"] = axis;
					});
			return res;
		};
		plot.getXAxes = function() {
			return xaxes;
		};
		plot.getYAxes = function() {
			return yaxes;
		};
		plot.c2p = canvasToAxisCoords;
		plot.p2c = axisToCanvasCoords;
		plot.getOptions = function() {
			return options;
		};
		plot.highlight = highlight;
		plot.unhighlight = unhighlight;
		plot.triggerRedrawOverlay = triggerRedrawOverlay;
		plot.pointOffset = function(point) {
			return {
				left : parseInt(xaxes[axisNumber(point, "x") - 1].p2c(+point.x)
						+ plotOffset.left, 10),
				top : parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y)
						+ plotOffset.top, 10)
			};
		};
		plot.shutdown = shutdown;
		plot.resize = function() {
			var width = placeholder.width(), height = placeholder.height();
			surface.resize(width, height);
			overlay.resize(width, height);
		};

		// public attributes
		plot.hooks = hooks;

		// initialize
		initPlugins(plot);
		parseOptions(options_);
		setupCanvases();
		setData(data_);
		setupGrid();
		draw();
		bindEvents();

		function executeHooks(hook, args) {
			args = [ plot ].concat(args);
			for (var i = 0; i < hook.length; ++i)
				hook[i].apply(this, args);
		}

		function initPlugins() {

			// References to key classes, allowing plugins to modify them

			var classes = {
				Canvas : Canvas
			};

			for (var i = 0; i < plugins.length; ++i) {
				var p = plugins[i];
				p.init(plot, classes);
				if (p.options)
					$.extend(true, options, p.options);
			}
		}

		function parseOptions(opts) {

			$.extend(true, options, opts);

			// $.extend merges arrays, rather than replacing them. When less
			// colors are provided than the size of the default palette, we
			// end up with those colors plus the remaining defaults, which is
			// not expected behavior; avoid it by replacing them here.

			if (opts && opts.colors) {
				options.colors = opts.colors;
			}

			if (options.xaxis.color == null)
				options.xaxis.color = $.color.parse(options.grid.color).scale(
						'a', 0.22).toString();
			if (options.yaxis.color == null)
				options.yaxis.color = $.color.parse(options.grid.color).scale(
						'a', 0.22).toString();

			if (options.xaxis.tickColor == null) // grid.tickColor for
													// back-compatibility
				options.xaxis.tickColor = options.grid.tickColor
						|| options.xaxis.color;
			if (options.yaxis.tickColor == null) // grid.tickColor for
													// back-compatibility
				options.yaxis.tickColor = options.grid.tickColor
						|| options.yaxis.color;

			if (options.grid.borderColor == null)
				options.grid.borderColor = options.grid.color;
			if (options.grid.tickColor == null)
				options.grid.tickColor = $.color.parse(options.grid.color)
						.scale('a', 0.22).toString();

			// Fill in defaults for axis options, including any unspecified
			// font-spec fields, if a font-spec was provided.

			// If no x/y axis options were provided, create one of each anyway,
			// since the rest of the code assumes that they exist.

			var i, axisOptions, axisCount, fontDefaults = {
				style : placeholder.css("font-style"),
				size : Math.round(0.8 * (+placeholder.css("font-size").replace(
						"px", "") || 13)),
				variant : placeholder.css("font-variant"),
				weight : placeholder.css("font-weight"),
				family : placeholder.css("font-family")
			};

			fontDefaults.lineHeight = fontDefaults.size * 1.15;

			axisCount = options.xaxes.length || 1;
			for (i = 0; i < axisCount; ++i) {

				axisOptions = options.xaxes[i];
				if (axisOptions && !axisOptions.tickColor) {
					axisOptions.tickColor = axisOptions.color;
				}

				axisOptions = $.extend(true, {}, options.xaxis, axisOptions);
				options.xaxes[i] = axisOptions;

				if (axisOptions.font) {
					axisOptions.font = $.extend({}, fontDefaults,
							axisOptions.font);
					if (!axisOptions.font.color) {
						axisOptions.font.color = axisOptions.color;
					}
				}
			}

			axisCount = options.yaxes.length || 1;
			for (i = 0; i < axisCount; ++i) {

				axisOptions = options.yaxes[i];
				if (axisOptions && !axisOptions.tickColor) {
					axisOptions.tickColor = axisOptions.color;
				}

				axisOptions = $.extend(true, {}, options.yaxis, axisOptions);
				options.yaxes[i] = axisOptions;

				if (axisOptions.font) {
					axisOptions.font = $.extend({}, fontDefaults,
							axisOptions.font);
					if (!axisOptions.font.color) {
						axisOptions.font.color = axisOptions.color;
					}
				}
			}

			// backwards compatibility, to be removed in future
			if (options.xaxis.noTicks && options.xaxis.ticks == null)
				options.xaxis.ticks = options.xaxis.noTicks;
			if (options.yaxis.noTicks && options.yaxis.ticks == null)
				options.yaxis.ticks = options.yaxis.noTicks;
			if (options.x2axis) {
				options.xaxes[1] = $.extend(true, {}, options.xaxis,
						options.x2axis);
				options.xaxes[1].position = "top";
			}
			if (options.y2axis) {
				options.yaxes[1] = $.extend(true, {}, options.yaxis,
						options.y2axis);
				options.yaxes[1].position = "right";
			}
			if (options.grid.coloredAreas)
				options.grid.markings = options.grid.coloredAreas;
			if (options.grid.coloredAreasColor)
				options.grid.markingsColor = options.grid.coloredAreasColor;
			if (options.lines)
				$.extend(true, options.series.lines, options.lines);
			if (options.points)
				$.extend(true, options.series.points, options.points);
			if (options.bars)
				$.extend(true, options.series.bars, options.bars);
			if (options.shadowSize != null)
				options.series.shadowSize = options.shadowSize;
			if (options.highlightColor != null)
				options.series.highlightColor = options.highlightColor;

			// save options on axes for future reference
			for (i = 0; i < options.xaxes.length; ++i)
				getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i];
			for (i = 0; i < options.yaxes.length; ++i)
				getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i];

			// add hooks from options
			for ( var n in hooks)
				if (options.hooks[n] && options.hooks[n].length)
					hooks[n] = hooks[n].concat(options.hooks[n]);

			executeHooks(hooks.processOptions, [ options ]);
		}

		function setData(d) {
			series = parseData(d);
			fillInSeriesOptions();
			processData();
		}

		function parseData(d) {
			var res = [];
			for (var i = 0; i < d.length; ++i) {
				var s = $.extend(true, {}, options.series);

				if (d[i].data != null) {
					s.data = d[i].data; // move the data instead of deep-copy
					delete d[i].data;

					$.extend(true, s, d[i]);

					d[i].data = s.data;
				} else
					s.data = d[i];
				res.push(s);
			}

			return res;
		}

		function axisNumber(obj, coord) {
			var a = obj[coord + "axis"];
			if (typeof a == "object") // if we got a real axis, extract number
				a = a.n;
			if (typeof a != "number")
				a = 1; // default to first axis
			return a;
		}

		function allAxes() {
			// return flat array without annoying null entries
			return $.grep(xaxes.concat(yaxes), function(a) {
				return a;
			});
		}

		function canvasToAxisCoords(pos) {
			// return an object with x/y corresponding to all used axes
			var res = {}, i, axis;
			for (i = 0; i < xaxes.length; ++i) {
				axis = xaxes[i];
				if (axis && axis.used)
					res["x" + axis.n] = axis.c2p(pos.left);
			}

			for (i = 0; i < yaxes.length; ++i) {
				axis = yaxes[i];
				if (axis && axis.used)
					res["y" + axis.n] = axis.c2p(pos.top);
			}

			if (res.x1 !== undefined)
				res.x = res.x1;
			if (res.y1 !== undefined)
				res.y = res.y1;

			return res;
		}

		function axisToCanvasCoords(pos) {
			// get canvas coords from the first pair of x/y found in pos
			var res = {}, i, axis, key;

			for (i = 0; i < xaxes.length; ++i) {
				axis = xaxes[i];
				if (axis && axis.used) {
					key = "x" + axis.n;
					if (pos[key] == null && axis.n == 1)
						key = "x";

					if (pos[key] != null) {
						res.left = axis.p2c(pos[key]);
						break;
					}
				}
			}

			for (i = 0; i < yaxes.length; ++i) {
				axis = yaxes[i];
				if (axis && axis.used) {
					key = "y" + axis.n;
					if (pos[key] == null && axis.n == 1)
						key = "y";

					if (pos[key] != null) {
						res.top = axis.p2c(pos[key]);
						break;
					}
				}
			}

			return res;
		}

		function getOrCreateAxis(axes, number) {
			if (!axes[number - 1])
				axes[number - 1] = {
					n : number, // save the number for future reference
					direction : axes == xaxes ? "x" : "y",
					options : $.extend(true, {}, axes == xaxes ? options.xaxis
							: options.yaxis)
				};

			return axes[number - 1];
		}

		function fillInSeriesOptions() {

			var neededColors = series.length, maxIndex = -1, i;

			// Subtract the number of series that already have fixed colors or
			// color indexes from the number that we still need to generate.

			for (i = 0; i < series.length; ++i) {
				var sc = series[i].color;
				if (sc != null) {
					neededColors--;
					if (typeof sc == "number" && sc > maxIndex) {
						maxIndex = sc;
					}
				}
			}

			// If any of the series have fixed color indexes, then we need to
			// generate at least as many colors as the highest index.

			if (neededColors <= maxIndex) {
				neededColors = maxIndex + 1;
			}

			// Generate all the colors, using first the option colors and then
			// variations on those colors once they're exhausted.

			var c, colors = [], colorPool = options.colors, colorPoolSize = colorPool.length, variation = 0;

			for (i = 0; i < neededColors; i++) {

				c = $.color.parse(colorPool[i % colorPoolSize] || "#666");

				// Each time we exhaust the colors in the pool we adjust
				// a scaling factor used to produce more variations on
				// those colors. The factor alternates negative/positive
				// to produce lighter/darker colors.

				// Reset the variation after every few cycles, or else
				// it will end up producing only white or black colors.

				if (i % colorPoolSize == 0 && i) {
					if (variation >= 0) {
						if (variation < 0.5) {
							variation = -variation - 0.2;
						} else
							variation = 0;
					} else
						variation = -variation;
				}

				colors[i] = c.scale('rgb', 1 + variation);
			}

			// Finalize the series options, filling in their colors

			var colori = 0, s;
			for (i = 0; i < series.length; ++i) {
				s = series[i];

				// assign colors
				if (s.color == null) {
					s.color = colors[colori].toString();
					++colori;
				} else if (typeof s.color == "number")
					s.color = colors[s.color].toString();

				// turn on lines automatically in case nothing is set
				if (s.lines.show == null) {
					var v, show = true;
					for (v in s)
						if (s[v] && s[v].show) {
							show = false;
							break;
						}
					if (show)
						s.lines.show = true;
				}

				// If nothing was provided for lines.zero, default it to match
				// lines.fill, since areas by default should extend to zero.

				if (s.lines.zero == null) {
					s.lines.zero = !!s.lines.fill;
				}

				// setup axes
				s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x"));
				s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y"));
			}
		}

		function processData() {
			var topSentry = Number.POSITIVE_INFINITY, bottomSentry = Number.NEGATIVE_INFINITY, fakeInfinity = Number.MAX_VALUE, i, j, k, m, length, s, points, ps, x, y, axis, val, f, p, data, format;

			function updateAxis(axis, min, max) {
				if (min < axis.datamin && min != -fakeInfinity)
					axis.datamin = min;
				if (max > axis.datamax && max != fakeInfinity)
					axis.datamax = max;
			}

			$.each(allAxes(), function(_, axis) {
				// init axis
				axis.datamin = topSentry;
				axis.datamax = bottomSentry;
				axis.used = false;
			});

			for (i = 0; i < series.length; ++i) {
				s = series[i];
				s.datapoints = {
					points : []
				};

				executeHooks(hooks.processRawData, [ s, s.data, s.datapoints ]);
			}

			// first pass: clean and copy data
			for (i = 0; i < series.length; ++i) {
				s = series[i];

				data = s.data;
				format = s.datapoints.format;

				if (!format) {
					format = [];
					// find out how to copy
					format.push({
						x : true,
						number : true,
						required : true
					});
					format.push({
						y : true,
						number : true,
						required : true
					});

					if (s.bars.show || (s.lines.show && s.lines.fill)) {
						var autoscale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero));
						format.push({
							y : true,
							number : true,
							required : false,
							defaultValue : 0,
							autoscale : autoscale
						});
						if (s.bars.horizontal) {
							delete format[format.length - 1].y;
							format[format.length - 1].x = true;
						}
					}

					s.datapoints.format = format;
				}

				if (s.datapoints.pointsize != null)
					continue; // already filled in

				s.datapoints.pointsize = format.length;

				ps = s.datapoints.pointsize;
				points = s.datapoints.points;

				var insertSteps = s.lines.show && s.lines.steps;
				s.xaxis.used = s.yaxis.used = true;

				for (j = k = 0; j < data.length; ++j, k += ps) {
					p = data[j];

					var nullify = p == null;
					if (!nullify) {
						for (m = 0; m < ps; ++m) {
							val = p[m];
							f = format[m];

							if (f) {
								if (f.number && val != null) {
									val = +val; // convert to number
									if (isNaN(val))
										val = null;
									else if (val == Infinity)
										val = fakeInfinity;
									else if (val == -Infinity)
										val = -fakeInfinity;
								}

								if (val == null) {
									if (f.required)
										nullify = true;

									if (f.defaultValue != null)
										val = f.defaultValue;
								}
							}

							points[k + m] = val;
						}
					}

					if (nullify) {
						for (m = 0; m < ps; ++m) {
							val = points[k + m];
							if (val != null) {
								f = format[m];
								// extract min/max info
								if (f.autoscale) {
									if (f.x) {
										updateAxis(s.xaxis, val, val);
									}
									if (f.y) {
										updateAxis(s.yaxis, val, val);
									}
								}
							}
							points[k + m] = null;
						}
					} else {
						// a little bit of line specific stuff that
						// perhaps shouldn't be here, but lacking
						// better means...
						if (insertSteps && k > 0 && points[k - ps] != null
								&& points[k - ps] != points[k]
								&& points[k - ps + 1] != points[k + 1]) {
							// copy the point to make room for a middle point
							for (m = 0; m < ps; ++m)
								points[k + ps + m] = points[k + m];

							// middle point has same y
							points[k + 1] = points[k - ps + 1];

							// we've added a point, better reflect that
							k += ps;
						}
					}
				}
			}

			// give the hooks a chance to run
			for (i = 0; i < series.length; ++i) {
				s = series[i];

				executeHooks(hooks.processDatapoints, [ s, s.datapoints ]);
			}

			// second pass: find datamax/datamin for auto-scaling
			for (i = 0; i < series.length; ++i) {
				s = series[i];
				points = s.datapoints.points;
				ps = s.datapoints.pointsize;
				format = s.datapoints.format;

				var xmin = topSentry, ymin = topSentry, xmax = bottomSentry, ymax = bottomSentry;

				for (j = 0; j < points.length; j += ps) {
					if (points[j] == null)
						continue;

					for (m = 0; m < ps; ++m) {
						val = points[j + m];
						f = format[m];
						if (!f || f.autoscale === false || val == fakeInfinity
								|| val == -fakeInfinity)
							continue;

						if (f.x) {
							if (val < xmin)
								xmin = val;
							if (val > xmax)
								xmax = val;
						}
						if (f.y) {
							if (val < ymin)
								ymin = val;
							if (val > ymax)
								ymax = val;
						}
					}
				}

				if (s.bars.show) {
					// make sure we got room for the bar on the dancing floor
					var delta;

					switch (s.bars.align) {
					case "left":
						delta = 0;
						break;
					case "right":
						delta = -s.bars.barWidth;
						break;
					case "center":
						delta = -s.bars.barWidth / 2;
						break;
					default:
						throw new Error("Invalid bar alignment: "
								+ s.bars.align);
					}

					if (s.bars.horizontal) {
						ymin += delta;
						ymax += delta + s.bars.barWidth;
					} else {
						xmin += delta;
						xmax += delta + s.bars.barWidth;
					}
				}

				updateAxis(s.xaxis, xmin, xmax);
				updateAxis(s.yaxis, ymin, ymax);
			}

			$.each(allAxes(), function(_, axis) {
				if (axis.datamin == topSentry)
					axis.datamin = null;
				if (axis.datamax == bottomSentry)
					axis.datamax = null;
			});
		}

		function setupCanvases() {

			// Make sure the placeholder is clear of everything except canvases
			// from a previous plot in this container that we'll try to re-use.

			placeholder.css("padding", 0) // padding messes up the positioning
			.children(":not(.flot-base,.flot-overlay)").remove();

			if (placeholder.css("position") == 'static')
				placeholder.css("position", "relative"); // for positioning
															// labels and
															// overlay

			surface = new Canvas("flot-base", placeholder);
			overlay = new Canvas("flot-overlay", placeholder); // overlay
																// canvas for
																// interactive
																// features

			ctx = surface.context;
			octx = overlay.context;

			// define which element we're listening for events on
			eventHolder = $(overlay.element).unbind();

			// If we're re-using a plot object, shut down the old one

			var existing = placeholder.data("plot");

			if (existing) {
				existing.shutdown();
				overlay.clear();
			}

			// save in case we get replotted
			placeholder.data("plot", plot);
		}

		function bindEvents() {
			// bind events
			if (options.grid.hoverable) {
				eventHolder.mousemove(onMouseMove);

				// Use bind, rather than .mouseleave, because we officially
				// still support jQuery 1.2.6, which doesn't define a shortcut
				// for mouseenter or mouseleave. This was a bug/oversight that
				// was fixed somewhere around 1.3.x. We can return to using
				// .mouseleave when we drop support for 1.2.6.

				eventHolder.bind("mouseleave", onMouseLeave);
			}

			if (options.grid.clickable)
				eventHolder.click(onClick);

			executeHooks(hooks.bindEvents, [ eventHolder ]);
		}

		function shutdown() {
			if (redrawTimeout)
				clearTimeout(redrawTimeout);

			eventHolder.unbind("mousemove", onMouseMove);
			eventHolder.unbind("mouseleave", onMouseLeave);
			eventHolder.unbind("click", onClick);

			executeHooks(hooks.shutdown, [ eventHolder ]);
		}

		function setTransformationHelpers(axis) {
			// set helper functions on the axis, assumes plot area
			// has been computed already

			function identity(x) {
				return x;
			}

			var s, m, t = axis.options.transform || identity, it = axis.options.inverseTransform;

			// precompute how much the axis is scaling a point
			// in canvas space
			if (axis.direction == "x") {
				s = axis.scale = plotWidth
						/ Math.abs(t(axis.max) - t(axis.min));
				m = Math.min(t(axis.max), t(axis.min));
			} else {
				s = axis.scale = plotHeight
						/ Math.abs(t(axis.max) - t(axis.min));
				s = -s;
				m = Math.max(t(axis.max), t(axis.min));
			}

			// data point to canvas coordinate
			if (t == identity) // slight optimization
				axis.p2c = function(p) {
					return (p - m) * s;
				};
			else
				axis.p2c = function(p) {
					return (t(p) - m) * s;
				};
			// canvas coordinate to data point
			if (!it)
				axis.c2p = function(c) {
					return m + c / s;
				};
			else
				axis.c2p = function(c) {
					return it(m + c / s);
				};
		}

		function measureTickLabels(axis) {

			var opts = axis.options, ticks = axis.ticks || [], labelWidth = opts.labelWidth || 0, labelHeight = opts.labelHeight || 0, maxWidth = labelWidth
					|| axis.direction == "x" ? Math.floor(surface.width
					/ (ticks.length || 1)) : null;
			legacyStyles = axis.direction + "Axis " + axis.direction + axis.n
					+ "Axis", layer = "flot-" + axis.direction + "-axis flot-"
					+ axis.direction + axis.n + "-axis " + legacyStyles,
					font = opts.font || "flot-tick-label tickLabel";

			for (var i = 0; i < ticks.length; ++i) {

				var t = ticks[i];

				if (!t.label)
					continue;

				var info = surface.getTextInfo(layer, t.label, font, null,
						maxWidth);

				labelWidth = Math.max(labelWidth, info.width);
				labelHeight = Math.max(labelHeight, info.height);
			}

			axis.labelWidth = opts.labelWidth || labelWidth;
			axis.labelHeight = opts.labelHeight || labelHeight;
		}

		function allocateAxisBoxFirstPhase(axis) {
			// find the bounding box of the axis by looking at label
			// widths/heights and ticks, make room by diminishing the
			// plotOffset; this first phase only looks at one
			// dimension per axis, the other dimension depends on the
			// other axes so will have to wait

			var lw = axis.labelWidth, lh = axis.labelHeight, pos = axis.options.position, tickLength = axis.options.tickLength, axisMargin = options.grid.axisMargin, padding = options.grid.labelMargin, all = axis.direction == "x" ? xaxes
					: yaxes, index, innermost;

			// determine axis margin
			var samePosition = $.grep(all, function(a) {
				return a && a.options.position == pos && a.reserveSpace;
			});
			if ($.inArray(axis, samePosition) == samePosition.length - 1)
				axisMargin = 0; // outermost

			// determine tick length - if we're innermost, we can use "full"
			if (tickLength == null) {
				var sameDirection = $.grep(all, function(a) {
					return a && a.reserveSpace;
				});

				innermost = $.inArray(axis, sameDirection) == 0;
				if (innermost)
					tickLength = "full";
				else
					tickLength = 5;
			}

			if (!isNaN(+tickLength))
				padding += +tickLength;

			// compute box
			if (axis.direction == "x") {
				lh += padding;

				if (pos == "bottom") {
					plotOffset.bottom += lh + axisMargin;
					axis.box = {
						top : surface.height - plotOffset.bottom,
						height : lh
					};
				} else {
					axis.box = {
						top : plotOffset.top + axisMargin,
						height : lh
					};
					plotOffset.top += lh + axisMargin;
				}
			} else {
				lw += padding;

				if (pos == "left") {
					axis.box = {
						left : plotOffset.left + axisMargin,
						width : lw
					};
					plotOffset.left += lw + axisMargin;
				} else {
					plotOffset.right += lw + axisMargin;
					axis.box = {
						left : surface.width - plotOffset.right,
						width : lw
					};
				}
			}

			// save for future reference
			axis.position = pos;
			axis.tickLength = tickLength;
			axis.box.padding = padding;
			axis.innermost = innermost;
		}

		function allocateAxisBoxSecondPhase(axis) {
			// now that all axis boxes have been placed in one
			// dimension, we can set the remaining dimension coordinates
			if (axis.direction == "x") {
				axis.box.left = plotOffset.left - axis.labelWidth / 2;
				axis.box.width = surface.width - plotOffset.left
						- plotOffset.right + axis.labelWidth;
			} else {
				axis.box.top = plotOffset.top - axis.labelHeight / 2;
				axis.box.height = surface.height - plotOffset.bottom
						- plotOffset.top + axis.labelHeight;
			}
		}

		function adjustLayoutForThingsStickingOut() {
			// possibly adjust plot offset to ensure everything stays
			// inside the canvas and isn't clipped off

			var minMargin = options.grid.minBorderMargin, margins = {
				x : 0,
				y : 0
			}, i, axis;

			// check stuff from the plot (FIXME: this should just read
			// a value from the series, otherwise it's impossible to
			// customize)
			if (minMargin == null) {
				minMargin = 0;
				for (i = 0; i < series.length; ++i)
					minMargin = Math
							.max(
									minMargin,
									2 * (series[i].points.radius + series[i].points.lineWidth / 2));
			}

			margins.x = margins.y = Math.ceil(minMargin);

			// check axis labels, note we don't check the actual
			// labels but instead use the overall width/height to not
			// jump as much around with replots
			$.each(allAxes(), function(_, axis) {
				var dir = axis.direction;
				if (axis.reserveSpace)
					margins[dir] = Math.ceil(Math
							.max(margins[dir], (dir == "x" ? axis.labelWidth
									: axis.labelHeight) / 2));
			});

			plotOffset.left = Math.max(margins.x, plotOffset.left);
			plotOffset.right = Math.max(margins.x, plotOffset.right);
			plotOffset.top = Math.max(margins.y, plotOffset.top);
			plotOffset.bottom = Math.max(margins.y, plotOffset.bottom);
		}

		function setupGrid() {
			var i, axes = allAxes(), showGrid = options.grid.show;

			// Initialize the plot's offset from the edge of the canvas

			for ( var a in plotOffset) {
				var margin = options.grid.margin || 0;
				plotOffset[a] = typeof margin == "number" ? margin
						: margin[a] || 0;
			}

			executeHooks(hooks.processOffset, [ plotOffset ]);

			// If the grid is visible, add its border width to the offset

			for ( var a in plotOffset) {
				if (typeof (options.grid.borderWidth) == "object") {
					plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0;
				} else {
					plotOffset[a] += showGrid ? options.grid.borderWidth : 0;
				}
			}

			// init axes
			$.each(axes, function(_, axis) {
				axis.show = axis.options.show;
				if (axis.show == null)
					axis.show = axis.used; // by default an axis is visible if
											// it's got data

				axis.reserveSpace = axis.show || axis.options.reserveSpace;

				setRange(axis);
			});

			if (showGrid) {

				var allocatedAxes = $.grep(axes, function(axis) {
					return axis.reserveSpace;
				});

				$.each(allocatedAxes, function(_, axis) {
					// make the ticks
					setupTickGeneration(axis);
					setTicks(axis);
					snapRangeToTicks(axis, axis.ticks);
					// find labelWidth/Height for axis
					measureTickLabels(axis);
				});

				// with all dimensions calculated, we can compute the
				// axis bounding boxes, start from the outside
				// (reverse order)
				for (i = allocatedAxes.length - 1; i >= 0; --i)
					allocateAxisBoxFirstPhase(allocatedAxes[i]);

				// make sure we've got enough space for things that
				// might stick out
				adjustLayoutForThingsStickingOut();

				$.each(allocatedAxes, function(_, axis) {
					allocateAxisBoxSecondPhase(axis);
				});
			}

			plotWidth = surface.width - plotOffset.left - plotOffset.right;
			plotHeight = surface.height - plotOffset.bottom - plotOffset.top;

			// now we got the proper plot dimensions, we can compute the scaling
			$.each(axes, function(_, axis) {
				setTransformationHelpers(axis);
			});

			if (showGrid) {
				drawAxisLabels();
			}

			insertLegend();
		}

		function setRange(axis) {
			var opts = axis.options, min = +(opts.min != null ? opts.min
					: axis.datamin), max = +(opts.max != null ? opts.max
					: axis.datamax), delta = max - min;

			if (delta == 0.0) {
				// degenerate case
				var widen = max == 0 ? 1 : 0.01;

				if (opts.min == null)
					min -= widen;
				// always widen max if we couldn't widen min to ensure we
				// don't fall into min == max which doesn't work
				if (opts.max == null || opts.min != null)
					max += widen;
			} else {
				// consider autoscaling
				var margin = opts.autoscaleMargin;
				if (margin != null) {
					if (opts.min == null) {
						min -= delta * margin;
						// make sure we don't go below zero if all values
						// are positive
						if (min < 0 && axis.datamin != null
								&& axis.datamin >= 0)
							min = 0;
					}
					if (opts.max == null) {
						max += delta * margin;
						if (max > 0 && axis.datamax != null
								&& axis.datamax <= 0)
							max = 0;
					}
				}
			}
			axis.min = min;
			axis.max = max;
		}

		function setupTickGeneration(axis) {
			var opts = axis.options;

			// estimate number of ticks
			var noTicks;
			if (typeof opts.ticks == "number" && opts.ticks > 0)
				noTicks = opts.ticks;
			else
				// heuristic based on the model a*sqrt(x) fitted to
				// some data points that seemed reasonable
				noTicks = 0.3 * Math.sqrt(axis.direction == "x" ? surface.width
						: surface.height);

			var delta = (axis.max - axis.min) / noTicks, dec = -Math.floor(Math
					.log(delta)
					/ Math.LN10), maxDec = opts.tickDecimals;

			if (maxDec != null && dec > maxDec) {
				dec = maxDec;
			}

			var magn = Math.pow(10, -dec), norm = delta / magn, // norm is
																// between 1.0
																// and 10.0
			size;

			if (norm < 1.5) {
				size = 1;
			} else if (norm < 3) {
				size = 2;
				// special case for 2.5, requires an extra decimal
				if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
					size = 2.5;
					++dec;
				}
			} else if (norm < 7.5) {
				size = 5;
			} else {
				size = 10;
			}

			size *= magn;

			if (opts.minTickSize != null && size < opts.minTickSize) {
				size = opts.minTickSize;
			}

			axis.delta = delta;
			axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
			axis.tickSize = opts.tickSize || size;

			// Time mode was moved to a plug-in in 0.8, but since so many people
			// use this
			// we'll add an especially friendly make sure they remembered to
			// include it.

			if (opts.mode == "time" && !axis.tickGenerator) {
				throw new Error("Time mode requires the flot.time plugin.");
			}

			// Flot supports base-10 axes; any other mode else is handled by a
			// plug-in,
			// like flot.time.js.

			if (!axis.tickGenerator) {

				axis.tickGenerator = function(axis) {

					var ticks = [], start = floorInBase(axis.min, axis.tickSize), i = 0, v = Number.NaN, prev;

					do {
						prev = v;
						v = start + i * axis.tickSize;
						ticks.push(v);
						++i;
					} while (v < axis.max && v != prev);
					return ticks;
				};

				axis.tickFormatter = function(value, axis) {

					var factor = axis.tickDecimals ? Math.pow(10,
							axis.tickDecimals) : 1;
					var formatted = "" + Math.round(value * factor) / factor;

					// If tickDecimals was specified, ensure that we have
					// exactly that
					// much precision; otherwise default to the value's own
					// precision.

					if (axis.tickDecimals != null) {
						var decimal = formatted.indexOf(".");
						var precision = decimal == -1 ? 0 : formatted.length
								- decimal - 1;
						if (precision < axis.tickDecimals) {
							return (precision ? formatted : formatted + ".")
									+ ("" + factor).substr(1, axis.tickDecimals
											- precision);
						}
					}

					return formatted;
				};
			}

			if ($.isFunction(opts.tickFormatter))
				axis.tickFormatter = function(v, axis) {
					return "" + opts.tickFormatter(v, axis);
				};

			if (opts.alignTicksWithAxis != null) {
				var otherAxis = (axis.direction == "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1];
				if (otherAxis && otherAxis.used && otherAxis != axis) {
					// consider snapping min/max to outermost nice ticks
					var niceTicks = axis.tickGenerator(axis);
					if (niceTicks.length > 0) {
						if (opts.min == null)
							axis.min = Math.min(axis.min, niceTicks[0]);
						if (opts.max == null && niceTicks.length > 1)
							axis.max = Math.max(axis.max,
									niceTicks[niceTicks.length - 1]);
					}

					axis.tickGenerator = function(axis) {
						// copy ticks, scaled to this axis
						var ticks = [], v, i;
						for (i = 0; i < otherAxis.ticks.length; ++i) {
							v = (otherAxis.ticks[i].v - otherAxis.min)
									/ (otherAxis.max - otherAxis.min);
							v = axis.min + v * (axis.max - axis.min);
							ticks.push(v);
						}
						return ticks;
					};

					// we might need an extra decimal since forced
					// ticks don't necessarily fit naturally
					if (!axis.mode && opts.tickDecimals == null) {
						var extraDec = Math.max(0, -Math.floor(Math
								.log(axis.delta)
								/ Math.LN10) + 1), ts = axis
								.tickGenerator(axis);

						// only proceed if the tick interval rounded
						// with an extra decimal doesn't give us a
						// zero at end
						if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0])
								.toFixed(extraDec))))
							axis.tickDecimals = extraDec;
					}
				}
			}
		}

		function setTicks(axis) {
			var oticks = axis.options.ticks, ticks = [];
			if (oticks == null || (typeof oticks == "number" && oticks > 0))
				ticks = axis.tickGenerator(axis);
			else if (oticks) {
				if ($.isFunction(oticks))
					// generate the ticks
					ticks = oticks(axis);
				else
					ticks = oticks;
			}

			// clean up/labelify the supplied ticks, copy them over
			var i, v;
			axis.ticks = [];
			for (i = 0; i < ticks.length; ++i) {
				var label = null;
				var t = ticks[i];
				if (typeof t == "object") {
					v = +t[0];
					if (t.length > 1)
						label = t[1];
				} else
					v = +t;
				if (label == null)
					label = axis.tickFormatter(v, axis);
				if (!isNaN(v))
					axis.ticks.push({
						v : v,
						label : label
					});
			}
		}

		function snapRangeToTicks(axis, ticks) {
			if (axis.options.autoscaleMargin && ticks.length > 0) {
				// snap to ticks
				if (axis.options.min == null)
					axis.min = Math.min(axis.min, ticks[0].v);
				if (axis.options.max == null && ticks.length > 1)
					axis.max = Math.max(axis.max, ticks[ticks.length - 1].v);
			}
		}

		function draw() {

			surface.clear();

			executeHooks(hooks.drawBackground, [ ctx ]);

			var grid = options.grid;

			// draw background, if any
			if (grid.show && grid.backgroundColor)
				drawBackground();

			if (grid.show && !grid.aboveData) {
				drawGrid();
			}

			for (var i = 0; i < series.length; ++i) {
				executeHooks(hooks.drawSeries, [ ctx, series[i] ]);
				drawSeries(series[i]);
			}

			executeHooks(hooks.draw, [ ctx ]);

			if (grid.show && grid.aboveData) {
				drawGrid();
			}

			surface.render();

			// A draw implies that either the axes or data have changed, so we
			// should probably update the overlay highlights as well.

			triggerRedrawOverlay();
		}

		function extractRange(ranges, coord) {
			var axis, from, to, key, axes = allAxes();

			for (var i = 0; i < axes.length; ++i) {
				axis = axes[i];
				if (axis.direction == coord) {
					key = coord + axis.n + "axis";
					if (!ranges[key] && axis.n == 1)
						key = coord + "axis"; // support x1axis as xaxis
					if (ranges[key]) {
						from = ranges[key].from;
						to = ranges[key].to;
						break;
					}
				}
			}

			// backwards-compat stuff - to be removed in future
			if (!ranges[key]) {
				axis = coord == "x" ? xaxes[0] : yaxes[0];
				from = ranges[coord + "1"];
				to = ranges[coord + "2"];
			}

			// auto-reverse as an added bonus
			if (from != null && to != null && from > to) {
				var tmp = from;
				from = to;
				to = tmp;
			}

			return {
				from : from,
				to : to,
				axis : axis
			};
		}

		function drawBackground() {
			ctx.save();
			ctx.translate(plotOffset.left, plotOffset.top);

			ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor,
					plotHeight, 0, "rgba(255, 255, 255, 0)");
			ctx.fillRect(0, 0, plotWidth, plotHeight);
			ctx.restore();
		}

		function drawGrid() {
			var i, axes, bw, bc;

			ctx.save();
			ctx.translate(plotOffset.left, plotOffset.top);

			// draw markings
			var markings = options.grid.markings;
			if (markings) {
				if ($.isFunction(markings)) {
					axes = plot.getAxes();
					// xmin etc. is backwards compatibility, to be
					// removed in the future
					axes.xmin = axes.xaxis.min;
					axes.xmax = axes.xaxis.max;
					axes.ymin = axes.yaxis.min;
					axes.ymax = axes.yaxis.max;

					markings = markings(axes);
				}

				for (i = 0; i < markings.length; ++i) {
					var m = markings[i], xrange = extractRange(m, "x"), yrange = extractRange(
							m, "y");

					// fill in missing
					if (xrange.from == null)
						xrange.from = xrange.axis.min;
					if (xrange.to == null)
						xrange.to = xrange.axis.max;
					if (yrange.from == null)
						yrange.from = yrange.axis.min;
					if (yrange.to == null)
						yrange.to = yrange.axis.max;

					// clip
					if (xrange.to < xrange.axis.min
							|| xrange.from > xrange.axis.max
							|| yrange.to < yrange.axis.min
							|| yrange.from > yrange.axis.max)
						continue;

					xrange.from = Math.max(xrange.from, xrange.axis.min);
					xrange.to = Math.min(xrange.to, xrange.axis.max);
					yrange.from = Math.max(yrange.from, yrange.axis.min);
					yrange.to = Math.min(yrange.to, yrange.axis.max);

					if (xrange.from == xrange.to && yrange.from == yrange.to)
						continue;

					// then draw
					xrange.from = xrange.axis.p2c(xrange.from);
					xrange.to = xrange.axis.p2c(xrange.to);
					yrange.from = yrange.axis.p2c(yrange.from);
					yrange.to = yrange.axis.p2c(yrange.to);

					if (xrange.from == xrange.to || yrange.from == yrange.to) {
						// draw line
						ctx.beginPath();
						ctx.strokeStyle = m.color || options.grid.markingsColor;
						ctx.lineWidth = m.lineWidth
								|| options.grid.markingsLineWidth;
						ctx.moveTo(xrange.from, yrange.from);
						ctx.lineTo(xrange.to, yrange.to);
						ctx.stroke();
					} else {
						// fill area
						ctx.fillStyle = m.color || options.grid.markingsColor;
						ctx.fillRect(xrange.from, yrange.to, xrange.to
								- xrange.from, yrange.from - yrange.to);
					}
				}
			}

			// draw the ticks
			axes = allAxes();
			bw = options.grid.borderWidth;

			for (var j = 0; j < axes.length; ++j) {
				var axis = axes[j], box = axis.box, t = axis.tickLength, x, y, xoff, yoff;
				if (!axis.show || axis.ticks.length == 0)
					continue;

				ctx.lineWidth = 1;

				// find the edges
				if (axis.direction == "x") {
					x = 0;
					if (t == "full")
						y = (axis.position == "top" ? 0 : plotHeight);
					else
						y = box.top - plotOffset.top
								+ (axis.position == "top" ? box.height : 0);
				} else {
					y = 0;
					if (t == "full")
						x = (axis.position == "left" ? 0 : plotWidth);
					else
						x = box.left - plotOffset.left
								+ (axis.position == "left" ? box.width : 0);
				}

				// draw tick bar
				if (!axis.innermost) {
					ctx.strokeStyle = axis.options.color;
					ctx.beginPath();
					xoff = yoff = 0;
					if (axis.direction == "x")
						xoff = plotWidth + 1;
					else
						yoff = plotHeight + 1;

					if (ctx.lineWidth == 1) {
						if (axis.direction == "x") {
							y = Math.floor(y) + 0.5;
						} else {
							x = Math.floor(x) + 0.5;
						}
					}

					ctx.moveTo(x, y);
					ctx.lineTo(x + xoff, y + yoff);
					ctx.stroke();
				}

				// draw ticks

				ctx.strokeStyle = axis.options.tickColor;

				ctx.beginPath();
				for (i = 0; i < axis.ticks.length; ++i) {
					var v = axis.ticks[i].v;

					xoff = yoff = 0;

					if (isNaN(v)
							|| v < axis.min
							|| v > axis.max
							// skip those lying on the axes if we got a border
							|| (t == "full"
									&& ((typeof bw == "object" && bw[axis.position] > 0) || bw > 0) && (v == axis.min || v == axis.max)))
						continue;

					if (axis.direction == "x") {
						x = axis.p2c(v);
						yoff = t == "full" ? -plotHeight : t;

						if (axis.position == "top")
							yoff = -yoff;
					} else {
						y = axis.p2c(v);
						xoff = t == "full" ? -plotWidth : t;

						if (axis.position == "left")
							xoff = -xoff;
					}

					if (ctx.lineWidth == 1) {
						if (axis.direction == "x")
							x = Math.floor(x) + 0.5;
						else
							y = Math.floor(y) + 0.5;
					}

					ctx.moveTo(x, y);
					ctx.lineTo(x + xoff, y + yoff);
				}

				ctx.stroke();
			}

			// draw border
			if (bw) {
				// If either borderWidth or borderColor is an object, then draw
				// the border
				// line by line instead of as one rectangle
				bc = options.grid.borderColor;
				if (typeof bw == "object" || typeof bc == "object") {
					if (typeof bw !== "object") {
						bw = {
							top : bw,
							right : bw,
							bottom : bw,
							left : bw
						};
					}
					if (typeof bc !== "object") {
						bc = {
							top : bc,
							right : bc,
							bottom : bc,
							left : bc
						};
					}

					if (bw.top > 0) {
						ctx.strokeStyle = bc.top;
						ctx.lineWidth = bw.top;
						ctx.beginPath();
						ctx.moveTo(0 - bw.left, 0 - bw.top / 2);
						ctx.lineTo(plotWidth, 0 - bw.top / 2);
						ctx.stroke();
					}

					if (bw.right > 0) {
						ctx.strokeStyle = bc.right;
						ctx.lineWidth = bw.right;
						ctx.beginPath();
						ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top);
						ctx.lineTo(plotWidth + bw.right / 2, plotHeight);
						ctx.stroke();
					}

					if (bw.bottom > 0) {
						ctx.strokeStyle = bc.bottom;
						ctx.lineWidth = bw.bottom;
						ctx.beginPath();
						ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom
								/ 2);
						ctx.lineTo(0, plotHeight + bw.bottom / 2);
						ctx.stroke();
					}

					if (bw.left > 0) {
						ctx.strokeStyle = bc.left;
						ctx.lineWidth = bw.left;
						ctx.beginPath();
						ctx.moveTo(0 - bw.left / 2, plotHeight + bw.bottom);
						ctx.lineTo(0 - bw.left / 2, 0);
						ctx.stroke();
					}
				} else {
					ctx.lineWidth = bw;
					ctx.strokeStyle = options.grid.borderColor;
					ctx.strokeRect(-bw / 2, -bw / 2, plotWidth + bw, plotHeight
							+ bw);
				}
			}

			ctx.restore();
		}

		function drawAxisLabels() {

			$
					.each(
							allAxes(),
							function(_, axis) {
								if (!axis.show || axis.ticks.length == 0)
									return;

								var box = axis.box, legacyStyles = axis.direction
										+ "Axis "
										+ axis.direction
										+ axis.n
										+ "Axis", layer = "flot-"
										+ axis.direction + "-axis flot-"
										+ axis.direction + axis.n + "-axis "
										+ legacyStyles, font = axis.options.font
										|| "flot-tick-label tickLabel", tick, x, y, halign, valign;

								surface.removeText(layer);

								for (var i = 0; i < axis.ticks.length; ++i) {

									tick = axis.ticks[i];
									if (!tick.label || tick.v < axis.min
											|| tick.v > axis.max)
										continue;

									if (axis.direction == "x") {
										halign = "center";
										x = plotOffset.left + axis.p2c(tick.v);
										if (axis.position == "bottom") {
											y = box.top + box.padding;
										} else {
											y = box.top + box.height
													- box.padding;
											valign = "bottom";
										}
									} else {
										valign = "middle";
										y = plotOffset.top + axis.p2c(tick.v);
										if (axis.position == "left") {
											x = box.left + box.width
													- box.padding;
											halign = "right";
										} else {
											x = box.left + box.padding;
										}
									}

									surface.addText(layer, x, y, tick.label,
											font, null, null, halign, valign);
								}
							});
		}

		function drawSeries(series) {
			if (series.lines.show)
				drawSeriesLines(series);
			if (series.bars.show)
				drawSeriesBars(series);
			if (series.points.show)
				drawSeriesPoints(series);
		}

		function drawSeriesLines(series) {
			function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
				var points = datapoints.points, ps = datapoints.pointsize, prevx = null, prevy = null;

				ctx.beginPath();
				for (var i = ps; i < points.length; i += ps) {
					var x1 = points[i - ps], y1 = points[i - ps + 1], x2 = points[i], y2 = points[i + 1];

					if (x1 == null || x2 == null)
						continue;

					// clip with ymin
					if (y1 <= y2 && y1 < axisy.min) {
						if (y2 < axisy.min)
							continue; // line segment is outside
						// compute new intersection point
						x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
						y1 = axisy.min;
					} else if (y2 <= y1 && y2 < axisy.min) {
						if (y1 < axisy.min)
							continue;
						x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
						y2 = axisy.min;
					}

					// clip with ymax
					if (y1 >= y2 && y1 > axisy.max) {
						if (y2 > axisy.max)
							continue;
						x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
						y1 = axisy.max;
					} else if (y2 >= y1 && y2 > axisy.max) {
						if (y1 > axisy.max)
							continue;
						x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
						y2 = axisy.max;
					}

					// clip with xmin
					if (x1 <= x2 && x1 < axisx.min) {
						if (x2 < axisx.min)
							continue;
						y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
						x1 = axisx.min;
					} else if (x2 <= x1 && x2 < axisx.min) {
						if (x1 < axisx.min)
							continue;
						y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
						x2 = axisx.min;
					}

					// clip with xmax
					if (x1 >= x2 && x1 > axisx.max) {
						if (x2 > axisx.max)
							continue;
						y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
						x1 = axisx.max;
					} else if (x2 >= x1 && x2 > axisx.max) {
						if (x1 > axisx.max)
							continue;
						y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
						x2 = axisx.max;
					}

					if (x1 != prevx || y1 != prevy)
						ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1)
								+ yoffset);

					prevx = x2;
					prevy = y2;
					ctx
							.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2)
									+ yoffset);
				}
				ctx.stroke();
			}

			function plotLineArea(datapoints, axisx, axisy) {
				var points = datapoints.points, ps = datapoints.pointsize, bottom = Math
						.min(Math.max(0, axisy.min), axisy.max), i = 0, top, areaOpen = false, ypos = 1, segmentStart = 0, segmentEnd = 0;

				// we process each segment in two turns, first forward
				// direction to sketch out top, then once we hit the
				// end we go backwards to sketch the bottom
				while (true) {
					if (ps > 0 && i > points.length + ps)
						break;

					i += ps; // ps is negative if going backwards

					var x1 = points[i - ps], y1 = points[i - ps + ypos], x2 = points[i], y2 = points[i
							+ ypos];

					if (areaOpen) {
						if (ps > 0 && x1 != null && x2 == null) {
							// at turning point
							segmentEnd = i;
							ps = -ps;
							ypos = 2;
							continue;
						}

						if (ps < 0 && i == segmentStart + ps) {
							// done with the reverse sweep
							ctx.fill();
							areaOpen = false;
							ps = -ps;
							ypos = 1;
							i = segmentStart = segmentEnd + ps;
							continue;
						}
					}

					if (x1 == null || x2 == null)
						continue;

					// clip x values

					// clip with xmin
					if (x1 <= x2 && x1 < axisx.min) {
						if (x2 < axisx.min)
							continue;
						y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
						x1 = axisx.min;
					} else if (x2 <= x1 && x2 < axisx.min) {
						if (x1 < axisx.min)
							continue;
						y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
						x2 = axisx.min;
					}

					// clip with xmax
					if (x1 >= x2 && x1 > axisx.max) {
						if (x2 > axisx.max)
							continue;
						y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
						x1 = axisx.max;
					} else if (x2 >= x1 && x2 > axisx.max) {
						if (x1 > axisx.max)
							continue;
						y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
						x2 = axisx.max;
					}

					if (!areaOpen) {
						// open area
						ctx.beginPath();
						ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
						areaOpen = true;
					}

					// now first check the case where both is outside
					if (y1 >= axisy.max && y2 >= axisy.max) {
						ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
						ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
						continue;
					} else if (y1 <= axisy.min && y2 <= axisy.min) {
						ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
						ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
						continue;
					}

					// else it's a bit more complicated, there might
					// be a flat maxed out rectangle first, then a
					// triangular cutout or reverse; to find these
					// keep track of the current x values
					var x1old = x1, x2old = x2;

					// clip the y values, without shortcutting, we
					// go through all cases in turn

					// clip with ymin
					if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
						x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
						y1 = axisy.min;
					} else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
						x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
						y2 = axisy.min;
					}

					// clip with ymax
					if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
						x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
						y1 = axisy.max;
					} else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
						x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
						y2 = axisy.max;
					}

					// if the x value was changed we got a rectangle
					// to fill
					if (x1 != x1old) {
						ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1));
						// it goes to (x1, y1), but we fill that below
					}

					// fill triangular section, this sometimes result
					// in redundant points if (x1, y1) hasn't changed
					// from previous line to, but we just ignore that
					ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
					ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));

					// fill the other rectangle if it's there
					if (x2 != x2old) {
						ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
						ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2));
					}
				}
			}

			ctx.save();
			ctx.translate(plotOffset.left, plotOffset.top);
			ctx.lineJoin = "round";

			var lw = series.lines.lineWidth, sw = series.shadowSize;
			// FIXME: consider another form of shadow when filling is turned on
			if (lw > 0 && sw > 0) {
				// draw shadow as a thick and thin line with transparency
				ctx.lineWidth = sw;
				ctx.strokeStyle = "rgba(0,0,0,0.1)";
				// position shadow at angle from the mid of line
				var angle = Math.PI / 18;
				plotLine(series.datapoints,
						Math.sin(angle) * (lw / 2 + sw / 2), Math.cos(angle)
								* (lw / 2 + sw / 2), series.xaxis, series.yaxis);
				ctx.lineWidth = sw / 2;
				plotLine(series.datapoints,
						Math.sin(angle) * (lw / 2 + sw / 4), Math.cos(angle)
								* (lw / 2 + sw / 4), series.xaxis, series.yaxis);
			}

			ctx.lineWidth = lw;
			ctx.strokeStyle = series.color;
			var fillStyle = getFillStyle(series.lines, series.color, 0,
					plotHeight);
			if (fillStyle) {
				ctx.fillStyle = fillStyle;
				plotLineArea(series.datapoints, series.xaxis, series.yaxis);
			}

			if (lw > 0)
				plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis);
			ctx.restore();
		}

		function drawSeriesPoints(series) {
			function plotPoints(datapoints, radius, fillStyle, offset, shadow,
					axisx, axisy, symbol) {
				var points = datapoints.points, ps = datapoints.pointsize;

				for (var i = 0; i < points.length; i += ps) {
					var x = points[i], y = points[i + 1];
					if (x == null || x < axisx.min || x > axisx.max
							|| y < axisy.min || y > axisy.max)
						continue;

					ctx.beginPath();
					x = axisx.p2c(x);
					y = axisy.p2c(y) + offset;
					if (symbol == "circle")
						ctx.arc(x, y, radius, 0,
								shadow ? Math.PI : Math.PI * 2, false);
					else
						symbol(ctx, x, y, radius, shadow);
					ctx.closePath();

					if (fillStyle) {
						ctx.fillStyle = fillStyle;
						ctx.fill();
					}
					ctx.stroke();
				}
			}

			ctx.save();
			ctx.translate(plotOffset.left, plotOffset.top);

			var lw = series.points.lineWidth, sw = series.shadowSize, radius = series.points.radius, symbol = series.points.symbol;

			// If the user sets the line width to 0, we change it to a very
			// small value. A line width of 0 seems to force the default of 1.
			// Doing the conditional here allows the shadow setting to still be
			// optional even with a lineWidth of 0.

			if (lw == 0)
				lw = 0.0001;

			if (lw > 0 && sw > 0) {
				// draw shadow in two steps
				var w = sw / 2;
				ctx.lineWidth = w;
				ctx.strokeStyle = "rgba(0,0,0,0.1)";
				plotPoints(series.datapoints, radius, null, w + w / 2, true,
						series.xaxis, series.yaxis, symbol);

				ctx.strokeStyle = "rgba(0,0,0,0.2)";
				plotPoints(series.datapoints, radius, null, w / 2, true,
						series.xaxis, series.yaxis, symbol);
			}

			ctx.lineWidth = lw;
			ctx.strokeStyle = series.color;
			plotPoints(series.datapoints, radius, getFillStyle(series.points,
					series.color), 0, false, series.xaxis, series.yaxis, symbol);
			ctx.restore();
		}

		function drawBar(x, y, b, barLeft, barRight, offset, fillStyleCallback,
				axisx, axisy, c, horizontal, lineWidth) {
			var left, right, bottom, top, drawLeft, drawRight, drawTop, drawBottom, tmp;

			// in horizontal mode, we start the bar from the left
			// instead of from the bottom so it appears to be
			// horizontal rather than vertical
			if (horizontal) {
				drawBottom = drawRight = drawTop = true;
				drawLeft = false;
				left = b;
				right = x;
				top = y + barLeft;
				bottom = y + barRight;

				// account for negative bars
				if (right < left) {
					tmp = right;
					right = left;
					left = tmp;
					drawLeft = true;
					drawRight = false;
				}
			} else {
				drawLeft = drawRight = drawTop = true;
				drawBottom = false;
				left = x + barLeft;
				right = x + barRight;
				bottom = b;
				top = y;

				// account for negative bars
				if (top < bottom) {
					tmp = top;
					top = bottom;
					bottom = tmp;
					drawBottom = true;
					drawTop = false;
				}
			}

			// clip
			if (right < axisx.min || left > axisx.max || top < axisy.min
					|| bottom > axisy.max)
				return;

			if (left < axisx.min) {
				left = axisx.min;
				drawLeft = false;
			}

			if (right > axisx.max) {
				right = axisx.max;
				drawRight = false;
			}

			if (bottom < axisy.min) {
				bottom = axisy.min;
				drawBottom = false;
			}

			if (top > axisy.max) {
				top = axisy.max;
				drawTop = false;
			}

			left = axisx.p2c(left);
			bottom = axisy.p2c(bottom);
			right = axisx.p2c(right);
			top = axisy.p2c(top);

			// fill the bar
			if (fillStyleCallback) {
				c.beginPath();
				c.moveTo(left, bottom);
				c.lineTo(left, top);
				c.lineTo(right, top);
				c.lineTo(right, bottom);
				c.fillStyle = fillStyleCallback(bottom, top);
				c.fill();
			}

			// draw outline
			if (lineWidth > 0
					&& (drawLeft || drawRight || drawTop || drawBottom)) {
				c.beginPath();

				// FIXME: inline moveTo is buggy with excanvas
				c.moveTo(left, bottom + offset);
				if (drawLeft)
					c.lineTo(left, top + offset);
				else
					c.moveTo(left, top + offset);
				if (drawTop)
					c.lineTo(right, top + offset);
				else
					c.moveTo(right, top + offset);
				if (drawRight)
					c.lineTo(right, bottom + offset);
				else
					c.moveTo(right, bottom + offset);
				if (drawBottom)
					c.lineTo(left, bottom + offset);
				else
					c.moveTo(left, bottom + offset);
				c.stroke();
			}
		}

		function drawSeriesBars(series) {
			function plotBars(datapoints, barLeft, barRight, offset,
					fillStyleCallback, axisx, axisy) {
				var points = datapoints.points, ps = datapoints.pointsize;

				for (var i = 0; i < points.length; i += ps) {
					if (points[i] == null)
						continue;
					drawBar(points[i], points[i + 1], points[i + 2], barLeft,
							barRight, offset, fillStyleCallback, axisx, axisy,
							ctx, series.bars.horizontal, series.bars.lineWidth);
				}
			}

			ctx.save();
			ctx.translate(plotOffset.left, plotOffset.top);

			// FIXME: figure out a way to add shadows (for instance along the
			// right edge)
			ctx.lineWidth = series.bars.lineWidth;
			ctx.strokeStyle = series.color;

			var barLeft;

			switch (series.bars.align) {
			case "left":
				barLeft = 0;
				break;
			case "right":
				barLeft = -series.bars.barWidth;
				break;
			case "center":
				barLeft = -series.bars.barWidth / 2;
				break;
			default:
				throw new Error("Invalid bar alignment: " + series.bars.align);
			}

			var fillStyleCallback = series.bars.fill ? function(bottom, top) {
				return getFillStyle(series.bars, series.color, bottom, top);
			} : null;
			plotBars(series.datapoints, barLeft,
					barLeft + series.bars.barWidth, 0, fillStyleCallback,
					series.xaxis, series.yaxis);
			ctx.restore();
		}

		function getFillStyle(filloptions, seriesColor, bottom, top) {
			var fill = filloptions.fill;
			if (!fill)
				return null;

			if (filloptions.fillColor)
				return getColorOrGradient(filloptions.fillColor, bottom, top,
						seriesColor);

			var c = $.color.parse(seriesColor);
			c.a = typeof fill == "number" ? fill : 0.4;
			c.normalize();
			return c.toString();
		}

		function insertLegend() {

			placeholder.find(".legend").remove();

			if (!options.legend.show)
				return;

			var fragments = [], entries = [], rowStarted = false, lf = options.legend.labelFormatter, s, label;

			// Build a list of legend entries, with each having a label and a
			// color

			for (var i = 0; i < series.length; ++i) {
				s = series[i];
				if (s.label) {
					label = lf ? lf(s.label, s) : s.label;
					if (label) {
						entries.push({
							label : label,
							color : s.color
						});
					}
				}
			}

			// Sort the legend using either the default or a custom comparator

			if (options.legend.sorted) {
				if ($.isFunction(options.legend.sorted)) {
					entries.sort(options.legend.sorted);
				} else if (options.legend.sorted == "reverse") {
					entries.reverse();
				} else {
					var ascending = options.legend.sorted != "descending";
					entries.sort(function(a, b) {
						return a.label == b.label ? 0
								: ((a.label < b.label) != ascending ? 1 : -1 // Logical
																				// XOR
								);
					});
				}
			}

			// Generate markup for the list of entries, in their final order

			for (var i = 0; i < entries.length; ++i) {

				var entry = entries[i];

				if (i % options.legend.noColumns == 0) {
					if (rowStarted)
						fragments.push('</tr>');
					fragments.push('<tr>');
					rowStarted = true;
				}

				fragments
						.push('<td class="legendColorBox"><div style="border:1px solid '
								+ options.legend.labelBoxBorderColor
								+ ';padding:1px"><div style="width:4px;height:0;border:5px solid '
								+ entry.color
								+ ';overflow:hidden"></div></div></td>'
								+ '<td class="legendLabel">'
								+ entry.label
								+ '</td>');
			}

			if (rowStarted)
				fragments.push('</tr>');

			if (fragments.length == 0)
				return;

			var table = '<table style="font-size:smaller;color:'
					+ options.grid.color + '">' + fragments.join("")
					+ '</table>';
			if (options.legend.container != null)
				$(options.legend.container).html(table);
			else {
				var pos = "", p = options.legend.position, m = options.legend.margin;
				if (m[0] == null)
					m = [ m, m ];
				if (p.charAt(0) == "n")
					pos += 'top:' + (m[1] + plotOffset.top) + 'px;';
				else if (p.charAt(0) == "s")
					pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;';
				if (p.charAt(1) == "e")
					pos += 'right:' + (m[0] + plotOffset.right) + 'px;';
				else if (p.charAt(1) == "w")
					pos += 'left:' + (m[0] + plotOffset.left) + 'px;';
				var legend = $(
						'<div class="legend">'
								+ table
										.replace('style="',
												'style="position:absolute;'
														+ pos + ';') + '</div>')
						.appendTo(placeholder);
				if (options.legend.backgroundOpacity != 0.0) {
					// put in the transparent background
					// separately to avoid blended labels and
					// label boxes
					var c = options.legend.backgroundColor;
					if (c == null) {
						c = options.grid.backgroundColor;
						if (c && typeof c == "string")
							c = $.color.parse(c);
						else
							c = $.color.extract(legend, 'background-color');
						c.a = 1;
						c = c.toString();
					}
					var div = legend.children();
					$(
							'<div style="position:absolute;width:'
									+ div.width() + 'px;height:' + div.height()
									+ 'px;' + pos + 'background-color:' + c
									+ ';"> </div>').prependTo(legend).css(
							'opacity', options.legend.backgroundOpacity);
				}
			}
		}

		// interactive features

		var highlights = [], redrawTimeout = null;

		// returns the data item the mouse is over, or null if none is found
		function findNearbyItem(mouseX, mouseY, seriesFilter) {
			var maxDistance = options.grid.mouseActiveRadius, smallestDistance = maxDistance
					* maxDistance + 1, item = null, foundPoint = false, i, j, ps;

			for (i = series.length - 1; i >= 0; --i) {
				if (!seriesFilter(series[i]))
					continue;

				var s = series[i], axisx = s.xaxis, axisy = s.yaxis, points = s.datapoints.points, mx = axisx
						.c2p(mouseX), // precompute some stuff to make the
										// loop faster
				my = axisy.c2p(mouseY), maxx = maxDistance / axisx.scale, maxy = maxDistance
						/ axisy.scale;

				ps = s.datapoints.pointsize;
				// with inverse transforms, we can't use the maxx/maxy
				// optimization, sadly
				if (axisx.options.inverseTransform)
					maxx = Number.MAX_VALUE;
				if (axisy.options.inverseTransform)
					maxy = Number.MAX_VALUE;

				if (s.lines.show || s.points.show) {
					for (j = 0; j < points.length; j += ps) {
						var x = points[j], y = points[j + 1];
						if (x == null)
							continue;

						// For points and lines, the cursor must be within a
						// certain distance to the data point
						if (x - mx > maxx || x - mx < -maxx || y - my > maxy
								|| y - my < -maxy)
							continue;

						// We have to calculate distances in pixels, not in
						// data units, because the scales of the axes may be
						// different
						var dx = Math.abs(axisx.p2c(x) - mouseX), dy = Math
								.abs(axisy.p2c(y) - mouseY), dist = dx * dx
								+ dy * dy; // we save the sqrt

						// use <= to ensure last point takes precedence
						// (last generally means on top of)
						if (dist < smallestDistance) {
							smallestDistance = dist;
							item = [ i, j / ps ];
						}
					}
				}

				if (s.bars.show && !item) { // no other point can be nearby
					var barLeft = s.bars.align == "left" ? 0
							: -s.bars.barWidth / 2, barRight = barLeft
							+ s.bars.barWidth;

					for (j = 0; j < points.length; j += ps) {
						var x = points[j], y = points[j + 1], b = points[j + 2];
						if (x == null)
							continue;

						// for a bar graph, the cursor must be inside the bar
						if (series[i].bars.horizontal ? (mx <= Math.max(b, x)
								&& mx >= Math.min(b, x) && my >= y + barLeft && my <= y
								+ barRight)
								: (mx >= x + barLeft && mx <= x + barRight
										&& my >= Math.min(b, y) && my <= Math
										.max(b, y)))
							item = [ i, j / ps ];
					}
				}
			}

			if (item) {
				i = item[0];
				j = item[1];
				ps = series[i].datapoints.pointsize;

				return {
					datapoint : series[i].datapoints.points.slice(j * ps,
							(j + 1) * ps),
					dataIndex : j,
					series : series[i],
					seriesIndex : i
				};
			}

			return null;
		}

		function onMouseMove(e) {
			if (options.grid.hoverable)
				triggerClickHoverEvent("plothover", e, function(s) {
					return s["hoverable"] != false;
				});
		}

		function onMouseLeave(e) {
			if (options.grid.hoverable)
				triggerClickHoverEvent("plothover", e, function(s) {
					return false;
				});
		}

		function onClick(e) {
			triggerClickHoverEvent("plotclick", e, function(s) {
				return s["clickable"] != false;
			});
		}

		// trigger click or hover event (they send the same parameters
		// so we share their code)
		function triggerClickHoverEvent(eventname, event, seriesFilter) {
			var offset = eventHolder.offset(), canvasX = event.pageX
					- offset.left - plotOffset.left, canvasY = event.pageY
					- offset.top - plotOffset.top, pos = canvasToAxisCoords({
				left : canvasX,
				top : canvasY
			});

			pos.pageX = event.pageX;
			pos.pageY = event.pageY;

			var item = findNearbyItem(canvasX, canvasY, seriesFilter);

			if (item) {
				// fill in mouse pos for any listeners out there
				item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0])
						+ offset.left + plotOffset.left, 10);
				item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1])
						+ offset.top + plotOffset.top, 10);
			}

			if (options.grid.autoHighlight) {
				// clear auto-highlights
				for (var i = 0; i < highlights.length; ++i) {
					var h = highlights[i];
					if (h.auto == eventname
							&& !(item && h.series == item.series
									&& h.point[0] == item.datapoint[0] && h.point[1] == item.datapoint[1]))
						unhighlight(h.series, h.point);
				}

				if (item)
					highlight(item.series, item.datapoint, eventname);
			}

			placeholder.trigger(eventname, [ pos, item ]);
		}

		function triggerRedrawOverlay() {
			var t = options.interaction.redrawOverlayInterval;
			if (t == -1) { // skip event queue
				drawOverlay();
				return;
			}

			if (!redrawTimeout)
				redrawTimeout = setTimeout(drawOverlay, t);
		}

		function drawOverlay() {
			redrawTimeout = null;

			// draw highlights
			octx.save();
			overlay.clear();
			octx.translate(plotOffset.left, plotOffset.top);

			var i, hi;
			for (i = 0; i < highlights.length; ++i) {
				hi = highlights[i];

				if (hi.series.bars.show)
					drawBarHighlight(hi.series, hi.point);
				else
					drawPointHighlight(hi.series, hi.point);
			}
			octx.restore();

			executeHooks(hooks.drawOverlay, [ octx ]);
		}

		function highlight(s, point, auto) {
			if (typeof s == "number")
				s = series[s];

			if (typeof point == "number") {
				var ps = s.datapoints.pointsize;
				point = s.datapoints.points.slice(ps * point, ps * (point + 1));
			}

			var i = indexOfHighlight(s, point);
			if (i == -1) {
				highlights.push({
					series : s,
					point : point,
					auto : auto
				});

				triggerRedrawOverlay();
			} else if (!auto)
				highlights[i].auto = false;
		}

		function unhighlight(s, point) {
			if (s == null && point == null) {
				highlights = [];
				triggerRedrawOverlay();
				return;
			}

			if (typeof s == "number")
				s = series[s];

			if (typeof point == "number") {
				var ps = s.datapoints.pointsize;
				point = s.datapoints.points.slice(ps * point, ps * (point + 1));
			}

			var i = indexOfHighlight(s, point);
			if (i != -1) {
				highlights.splice(i, 1);

				triggerRedrawOverlay();
			}
		}

		function indexOfHighlight(s, p) {
			for (var i = 0; i < highlights.length; ++i) {
				var h = highlights[i];
				if (h.series == s && h.point[0] == p[0] && h.point[1] == p[1])
					return i;
			}
			return -1;
		}

		function drawPointHighlight(series, point) {
			var x = point[0], y = point[1], axisx = series.xaxis, axisy = series.yaxis, highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor
					: $.color.parse(series.color).scale('a', 0.5).toString();

			if (x < axisx.min || x > axisx.max || y < axisy.min
					|| y > axisy.max)
				return;

			var pointRadius = series.points.radius + series.points.lineWidth
					/ 2;
			octx.lineWidth = pointRadius;
			octx.strokeStyle = highlightColor;
			var radius = 1.5 * pointRadius;
			x = axisx.p2c(x);
			y = axisy.p2c(y);

			octx.beginPath();
			if (series.points.symbol == "circle")
				octx.arc(x, y, radius, 0, 2 * Math.PI, false);
			else
				series.points.symbol(octx, x, y, radius, false);
			octx.closePath();
			octx.stroke();
		}

		function drawBarHighlight(series, point) {
			var highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor
					: $.color.parse(series.color).scale('a', 0.5).toString(), fillStyle = highlightColor, barLeft = series.bars.align == "left" ? 0
					: -series.bars.barWidth / 2;

			octx.lineWidth = series.bars.lineWidth;
			octx.strokeStyle = highlightColor;

			drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft
					+ series.bars.barWidth, 0, function() {
				return fillStyle;
			}, series.xaxis, series.yaxis, octx, series.bars.horizontal,
					series.bars.lineWidth);
		}

		function getColorOrGradient(spec, bottom, top, defaultColor) {
			if (typeof spec == "string")
				return spec;
			else {
				// assume this is a gradient spec; IE currently only
				// supports a simple vertical gradient properly, so that's
				// what we support too
				var gradient = ctx.createLinearGradient(0, top, 0, bottom);

				for (var i = 0, l = spec.colors.length; i < l; ++i) {
					var c = spec.colors[i];
					if (typeof c != "string") {
						var co = $.color.parse(defaultColor);
						if (c.brightness != null)
							co = co.scale('rgb', c.brightness);
						if (c.opacity != null)
							co.a *= c.opacity;
						c = co.toString();
					}
					gradient.addColorStop(i / (l - 1), c);
				}

				return gradient;
			}
		}
	}

	// Add the plot function to the top level of the jQuery object

	$.plot = function(placeholder, data, options) {
		// var t0 = new Date();
		var plot = new Plot($(placeholder), data, options, $.plot.plugins);
		// (window.console ? console.log : alert)("time used (msecs): " + ((new
		// Date()).getTime() - t0.getTime()));
		return plot;
	};

	$.plot.version = "0.8.1";

	$.plot.plugins = [];

	// Also add the plot function as a chainable property

	$.fn.plot = function(data, options) {
		return this.each(function() {
			$.plot(this, data, options);
		});
	};

	// round to nearby lower multiple of base
	function floorInBase(n, base) {
		return base * Math.floor(n / base);
	}

})(jQuery);
